Home / 20,919.16-28,866.73-11,487.72

Finding the Fourth Proportional to 20,919.16, 28,866.73 and 11,487.72

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Solution

The fourth proportional to 20,919.16, 28,866.73 and 11,487.72 is: 15,852.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.16 : 28,866.73 = 11,487.72 : x
  2. Step 2: Convert to fraction form
    20,919.16/28,866.73 = 11,487.72/x
  3. Step 3: Cross multiply
    20,919.16x = 28,866.73 × 11,487.72
  4. Step 4: Simplify right side
    20,919.16x = 331,613,012.63
  5. Step 5: Solve for x
    x = 331,613,012.63/20,919.16
  6. Step 6: Final answer
    x = 15,852.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.